Installation Guidelines - Cisco WS-C2950T-48-SI Hardware Installation Manual

Preparing for Installation
This unit is intended for installation in restricted access areas. A restricted access area can be
Warning
accessed only through the use of a special tool, lock and key, or other means of security.
Statement 1017
Warning Ethernet cables must be shielded when used in a central office environment. Statement 171
Before connecting or disconnecting ground or power wires to the chassis, ensure that power is
Warning
removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel
board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch
handle of the circuit breaker in the OFF position. Use a voltmeter to test for 0 (zero) voltage at the
power terminals on the chassis. Statement 196
An exposed wire lead from a DC-input power source can conduct harmful levels of electricity. Be sure
Warning
that no exposed portion of the DC-input power source wire extends from the terminal block plug.
Statement 122
Warning This equipment is to be installed and maintained by service personnel only as defined by AS/NZS 3260
Clause 1.2.14.3 Service Personnel. Statement 88

Installation Guidelines

When determining where to place the switch, observe these guidelines.
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Catalyst 2950 Switch Hardware Installation Guide
2-4
Before installing the switch, first verify that the switch is operational by powering it on and running
POST. Follow the procedures in the
For 10/100 ports and 10/100/1000 ports, the cable length from a switch to an attached device cannot
exceed 328 feet (100 meters).
For 100BASE-FX ports, the cable length from a switch to an attached device cannot exceed
6562 feet (2 kilometers).
For 1000BASE-SX ports and 1000BASE-SX Gigabit Interface Converter (GBIC) module ports, the
cable length from a switch to an attached device cannot exceed 1804 feet (550 meters).
For 1000BASE-LX/LH GBIC module ports, the cable length from a switch to an attached device
cannot exceed 32,810 feet (10 kilometers).
For 1000BASE-ZX GBIC module ports, the cable length from a switch to an attached device cannot
exceed 328,100 feet (100 kilometers).
For 1000BASE-T GBIC module ports, the cable length from a switch to an attached device cannot
exceed 328 feet (100 meters).
For Coarse Wave Division Multiplexing (CWDM) GBIC module ports, the cable length from a
switch to an attached device cannot exceed 393,719 feet (120 kilometers). For specific cable lengths,
see the CWDM GBIC module documentation.
"Verifying Switch Operation" section on page
Chapter 2 Installation
2-6.
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